Cooler of discharge tubes



Aug. 29, 1950 F. c. w. sLooFF COOLER 0F DISCHARGE TUBES Filed May 7, 1948 IN V EN TOR.

ATTORNEYS Patented Aug. 29, 1950 COOLER OF DISCHARGE TUBES Florus Cornelis Willem Slooff, Eindhoven, Netherlands, assignor to Hartford National Bank and Trust Company, Hartford, Conn, as trustee Application May '7, 1948, Serial No. 25,672 In the Netherlands June 18, 1547 1 3 Claims.

This invention relates to electric discharge tubes and more particularly to the cooling of high power discharge devices and a supporting arrangement for such devices.

Discharge tubes of which the anode dissipation exceeds a determined value are required to be cooled. It is known to utilize a gaseous cooling medium for this purpose. With suitable proportioning and efiicacious construction it is then possible to ensure cooling factors which are higher than those which would be possible with the use of, for example, water.

It is also known to use the casing of the cooler as a support for the discharge tube so that the support for the casing of the cooler also carries the discharge tube. In such cases a compact assembly may be obtained. In the case of aircooling the cooling air is led into the casing of the'cooler by means of channels provided in the side-wall thereof. This may involve difficulties. however. If, as is common practice, the casing of the cooler serves as a support for the discharge tube, the casing will preferably be positioned, for example, on a floor, the inlet and outlet channels for the c001ing medium in this case being provided above the floor and occupying space which, in view of the electrical requirements of the equipment, could be used to better advantage. If the support for the casing of the cooler is positioned above the floor, the channels are also located at a determined altitude above the floor and occupy space which could be better used by the parts used in connection with the discharge tube.

All the said disadvantages are obviated by the present invention, according to which in the case of a discharge tube cooled by a gaseous medium and having a cooler which also serves as a support for the discharge tube to be cooled, the cooler is constructed in such manner that the inlet and outlet apertures for the gaseous medium are provided at the bottom of the cooler.

The invention will now be explained more fully by reference to the accompanying drawing showing, by way of example, one embodiment thereof.

A discharge tube, for example a transmitter tube, comprises a glass portion I and a metallic anode 2, which is required to be cooled by a gaseous medium, for example air. The anode 2 is surrounded by rings 3 provided for leading the cooling air. The tube comprises a carrier plate 4 which bears on the casing 5 of the cooler so that the latter supports the discharge tube. The casing 5 is constituted by two parts, an upper casing 6 and a lower casing I, which are joined by means of bolts. As has already been suggested, the lower casing l is preferably manu factured from insulating material, for example ceramic material. The bottom of the lower casing 1 exhibits two apertures 8 and 9 through which the cooling gaseous medium is led in and out respectively. The lower casing l furthermore comprises a flange ID.

The whole of the combination discharge tube and cooler bears on a support, for example a floor H. Two holes l2 and i3 provided in the floor correspond to the apertures 8 and 9 provided in the casing of the cooler. Two tubes l4 and I5 lead to the holes 12 and I3 and serve to supply and carry off the cooling gaseous medium respectively. If desired, tube I5 may be dispensed with, if the medium is supplied through tube N. If the medium is sucked through the installation. then tube l4 may be dispensed with.

It is evident that it is thus possible to obtain a compact, simple solution whereby the transmitter tube and the cooler are accessible on all sides and the space about the tube may be used for positioning any auxiliary parts required, such as coils, condensers, etc. The arrangement according to the invention affords certain advantages also in electrical respect on account of low mutual capacities, and the like.

It is possible for the housing of the device supplying the required gaseous medium under pressure to the cooler and carrying it off at underpressure, to be secured directly to the floor l I, so that the tubes l4 and i5 may be dispensed with and the device becomes even simpler and less expensive of construction.

What I claim is:

1. A cooling arrangement for a discharge tube of the type providing a gaseous coolant for said discharge tube and means of support for said tube, said cooling arrangement comprising a casing having an upper portion and a lower portion of substantially equal volumes, said upper portion being adapted to receive the part of the tube to be cooled, said lower portion being free of said tube and having first and second chambers respectively connected with said upper portion by first and second apertures in said portions, and a bottom portion on said lower portion of said casing, said bottom portion having first and second openings to communicate with said first and second chambers and apertures respectively, for the inlet and the outlet of said coolant.

2. A cooling arrangement for a discharge tube of the type providing a gaseous coolant for said wwa/ 1,

discharge tube and means of support for said tube, said cooling arrangement comprising a casing having an upper and a lower compartment of substantially equal volumes, said upper compartment being adapted to support said tube and to receive the part of the tube to be cooled, said lower compartment having first and second chambers respectively connected with said upper portion by first and second apertures in said compartments, a bottom portion on said lower compartment and a support for said casing, said bottom portion and said support having first and second registering openings to communicate with said first and second chambers and apertures respectively for the inlet and outlet of said coolant.

3. A cooling arrangement for a discharge tube of the type providing a gaseous coolant for said discharge tube and means of support for said tube, said cooling arrangement comprising a casing having an upper portion and a lower portion of substantially equal volumes, said upper portion being adapted to support the tube, part of said tube including the electrical connections being disposed outside of said casing, and the tively for the inlet and the outlet of said coolant.

FLORUS CORNELIS WILLEM SLOOFF.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,570,959 Gargan Jan. 26, 1926 1,905,811 Culver Apr. 25, 1933 2,159,782 Conklin et a1. May 23, 1939 2,312,465 Zodtner Mar. 2, 1943 Litton Mar. 2, 1943 

